Moisture curable adhesive compositions

Abstract

A moisture curable composition, and a method of application and a substrate including the same are disclosed herein. In some embodiments, a curable composition includes a component (A) comprising an organic polymer containing reactive silicon groups represented by the general formula (1), a component (B) comprising an organic polymer having a viscosity lower than 10,000 cP at 23° C. containing reactive silicon groups represented by the general formula (2), and a component (C) comprising a polyolefin polymer. The moisture curable composition has universal adhesiveness to an adhesion-resistant substrate, such as PVC, EPDM, and TPO. The substrates can be smooth-back or fleece-back substrates.

The invention claimed is: 
     
       1. A curable composition, comprising:
 a polymer blend consisting of: 
 a component (A) having an organic polymer containing reactive silicon groups represented by the following general formula (1):
   —Si(R 1   3-a )X a   (1)
 
 
 wherein R 1  represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms, 
 wherein X represents a hydrolyzable group, wherein each X is the same or different when two or more X are present, 
 a is an integer from 1 to 3, 
 when a is 1, each R 1  may be the same or different, and 
 when a is 2 or 3, each X may be the same or different; 
 a component (B) having an organic polymer containing reactive silicon groups, wherein the organic polymer having a viscosity lower than 10,000 cP at 23° C., and wherein the reactive silicon groups represented by the following general formula (2):
   —Si(R 2   3-b )X b   (2)
 
 
 wherein R 2  represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms, 
 wherein X represents a hydroxyl group or a hydrolyzable group, wherein each X is the same or different when two or more X are present 
 b is an integer from 1 to 3, 
 when b is 1, each R 2  may be the same or different, and 
 when b is 2 or 3, each X may be the same or different; and 
 a component (C) having a polyolefin polymer. 
 
     
     
       2. The curable composition of  claim 1 , wherein the organic polymer of component (B) has a viscosity lower than 5,000 cP at 23° C. 
     
     
       3. The curable composition of  claim 1 , wherein the organic polymer of component (A) has a viscosity greater than 20,000 cP at 23° C. 
     
     
       4. The curable composition of  claim 1 , wherein the organic polymer of component (A) comprises a main chain of polyoxypropylene. 
     
     
       5. The curable composition of  claim 1 , wherein the organic polymer of component (B) comprises a main chain of polyoxypropylene. 
     
     
       6. The curable composition of  claim 1 , wherein the organic polymer of component (A) comprises a group represented by the following general formula (3):
   —NR 3 C(═O)—  (3)
 
 wherein R 3  represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms. 
 
     
     
       7. The curable composition of  claim 1 , wherein the organic polymer of component (B) comprises a group represented by the following general formula (4):
   —NR 4 C(═O)—  (4)
 
 wherein R 4  represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms. 
 
     
     
       8. The curable composition of  claim 1 , wherein component (C) comprises chlorinated polyolefin polymer. 
     
     
       9. The curable composition of  claim 1 , wherein component (C) comprises a polymer modified with acrylic acid moieties, maleic acid, and/or maleic anhydride. 
     
     
       10. The curable composition of  claim 1 , wherein component (C) comprises a solvent or a plasticizer to disperse the polyolefin polymer. 
     
     
       11. The curable composition of  claim 1 , further comprising:
 an additive. 
 
     
     
       12. The curable composition of  claim 11 , wherein the additive is selected from the group consisting of a filler, an adhesion promoter, a dehydration agent, a plasticizer, an anti-sagging agent, a stabilizer, a curing catalyst, and combinations thereof. 
     
     
       13. A method of applying a curable composition, comprising:
 applying the curable composition of  claim 1  to a substrate. 
 
     
     
       14. The method of  claim 13 , wherein the substrate is selected from the group consisting of polyvinyl chloride (PVC), ethylene propylene diene rubber (EPDM), and thermoplastic polyolefin (TPO). 
     
     
       15. The method of  claim 14 , wherein the substrate is a smooth-back substrate. 
     
     
       16. The method of  claim 13 , further comprising:
 applying a primer to the substrate prior to application of the curable composition. 
 
     
     
       17. A composition, comprising:
 a substrate; and 
 the curable composition of  claim 1 . 
 
     
     
       18. The composition of  claim 17 , wherein the substrate is selected from the group consisting of polyvinyl chloride (PVC), ethylene propylene diene rubber (EPDM), and thermoplastic polyolefin (TPO). 
     
     
       19. The composition of  claim 18 , wherein the substrate is a smooth-back substrate. 
     
     
       20. A curable composition, consisting of:
 a component (A) having an organic polymer containing reactive silicon groups represented by the following general formula (1):
   —Si(R 1   3-a )X a   (1)
 
 
 wherein R 1  represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms, 
 wherein X represents a hydrolyzable group, wherein each X is the same or different when two or more X are present, 
 a is an integer from 1 to 3, 
 when a is 1, each R 1  may be the same or different, and 
 when a is 2 or 3, each X may be the same or different; 
 a component (B) having an organic polymer containing reactive silicon groups, wherein the organic polymer having a viscosity lower than 10,000 cP at 23° C., and wherein the reactive silicon groups represented by the following general formula (2):
   —Si(R 2   3-b )X b   (2)
 
 
 wherein R 2  represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms, 
 wherein X represents a hydroxyl group or a hydrolyzable group, wherein each X is the same or different when two or more X are present 
 b is an integer from 1 to 3, 
 when b is 1, each R 2  may be the same or different, and 
 when b is 2 or 3, each X may be the same or different; 
 a component (C) having a polyolefin polymer; and 
 an additive selected from the group consisting of a filler, a dehydration agent, a plasticizer, an anti-sagging agent, a stabilizer, a curing catalyst, and combinations thereof.